Automatic stop for can-making machines



April 13, 1926. 1,580,421 l M.L.DoDGEQ yAUTOMATIC STOP F03 CAN MAKING MACHINESA Filed Feb. e, 192s 4 Shet 5heet l ATTORNEY April 13 1926.

1,580,421 M. L. DODGE AUTOMATIC STOP FOR CAN MAKING MACHINES Filed Feb. e, 192s 4 Sheetssheet 2 NVENTOR NER Ton ZL DODS/S TTORNE April 13, 1926.

M. L. DODGE AUTOMATIC STOP FOR CAN MAKING MACHINES Filed Feb. e. 1925 y 4 gheetsheetfz 40 50', 75' 6J/6* /vv lNvENToR MER'ra/v .Zj. P0065 April 13 1926.

M. L. DODGE AUTOMATIC STOP FOR CAN MAK-ING MACHINES Filed Fabi e, 192s .4 Shetsfsheet .4

` lNvl-:NTORV ME/Pra/v l. 2902265 'ATTORNE lfatented 1926..

l UNITED STATES MERTON L. DDGE, oF SEATTLE, WASHINGTON, AssIGNonv'ro THE sEATTLE iis'roicia mON WORKS, OF SEATTLE, WASHINGTON. l

AUTOHATICSTOP POE. CAN-IIAIKINLG MACHINES.

'Applicaties med February ,-I isas. serial Nb. 617,397. i

To all whom z't may concern:

Be it known that I, MERToN L. Dorion, a citizen of the United States, and a resident L of Seattle, King County, Washington, have invented certain new and useful Improvements in Automatic Sto s for Can-Making Machines, of which theH ollowing is a speci ication. c l

vThis invention relates tocan making malochines, and more particularly to yimprovenism for accomplishing theabove object.'

ments in the machine known in the can making art as the double seamer, and vwhich operates to secure the ends of the4 cans to theavtlol levers.

body portion," v The principal object of this invention is -to provide means yfor auto atically stopping-the double seamer shou d the can end feed mechanism embodied thereinjfor any reason'fail to function. d

Other objects'of the invention reside in the various details of construction and in the combination of parts embodied inthe mecha- In accomplishin these and other objects of the invention, have Vprovided the improved det'ails of construction, the preferred forms of which are illustrated'in the a'cccorripanying drawings, whereini Figure 1 shows a side elevation of a part of a machine equipped with mechanism embodied in the present invention.

. Figure 2 is a sectional view, taken on'the "line 2-2 in Figure 1, illustrating the conoperations completed.

struction' of the clutch control mechanism.

` Figure 3 shows in plan View 'a part of the can end feed disk, and showing in a horizontal section, taken on line 3-3 in Figure .4, parts of the valve operating'mechanisrn.

I Figure 4 is a vertical, sectional viefwv Figure 10 is a similar view showing the' Ibrakeon, and clutch thrownout of engagement. i

Figure 11 is a partial view of the brake mechanism, illustrating an alternative construction Jwhereby the brake may be actuated electrically by utilizing a, solenoid. Y Figure 12 is a sectional view of a housing and contact member used in the alternative construction inlieu of the valv'e mechanism Figures 13, .14, 15, and 16, are similar views, taken horizontallythrough the contactv housing and showningf. different vposif tions fof the contact actuating and control members for different positions ofthe con- Referring more in detail to the drawings, 1 designates, as a whole, a machine to which the present mechanism is applied, and 2,des

ignates ca'n bodies that are being moved into the machine by means of a belt 3.o(perating about a driven sprocket 30 andtravelinv in the direction' indicated by the arrow adjacent thereto. Supported upon` the frame o' the machine are vertical guide standardsl and which are` fed, one at a time, by meansv of a reciprocating blade designated 'y at 6, from the lower end of the stack onto a circuwhereinafstack of'ca'nends 5 are supported,

lar tablel -or disk 7, to be advanced to the -clinching head .of the machinecby the fingers 8, of a turret 8, that is fixed on a ver- 1 tical, revolubly driven shaft 9. In this machine the can bodies 2 are advanced after leaving belt .3 by a turret similar to turret 8 lshown in Figure 3, and which is revolvc'd also by shaft 9, and they are advanced in accordance with Land directly beneath the covers 5 therefor.y

. During the operation of the machine, the` covers or ends are pickedl up by a suction cup arrangement and are placed thereby upon the ends of the bodies 2 andare secured 'to the bodies'by the double seamer device,

not illustrated. Should the end feedflevice for any reason fail to operate,'or should the body supply become exhausted and endsv continue to be fed into the machine, without the present devicedaniage to the pai-ts would result and there would be a. loss of time while parts. were being readjusted and damaged bodies removed.

' he aneans provided for automatically stopping the machine, should the feed device for any-reasonfail yto function, comprises levers 10 and 1l that have ends fixed respectively to a tubularshaft 12 and a, shaft 13 that is fitted revolubly therein. "l These shafts are supported verticallyl by a bracket 14, formed as a part of a valvehousi-ng 25 and which is secured for vertical adjustment to .the can guide table, or disk, 7, by a cap 16,

as shown in Figures 3 and ,4. At the Vswing'- ing ends of levers 10 and 11 are rollers 17j and 18 that are adapted respectively to be simultaneously engaged by the can ends and can bodies as the latter are advanced, to thereby cause the levers to swing outwardly, as shown in dotted lines in Figure 3, and to hlereby rotate their` supporting shafts 12 an 3.

The levers are held yieldablyin such posi- C tion that their rollers will be engaged by the rotatably within the valve 19 and the cover .25 of the housing has 'a\hol`low .body 21 fitted within the valve 20. This hollow body is connected by a pipe 22 with a vacuum chamber, designated at 22', and has ports 23v and 23 at diametrically opposite points in its 'side walls. rllhe construction -and arrangement provides an air chamber; 24 in the body 21 and an\,annular chamber 26'about the valve 19. rlhe valve 19 is provided at opposite sides withports 27-27 and valve 20 is provided at opposite sides with equally spaced pairs of ports 28-28, butthe ports of these several parts normally are not in registration and no' air connection is, provided between.v chambers 24 and 26.

'When the machine 1s operating normally,

' with can bodies andv ends being advanced to the machine in proper relation, levers 10 and 11 will'be engaged and moved simultaneously to rotate valves 19fand 20 within the valve housing but without changing their relation to each other and without making an air passage'between chambers 24 and 26, but should a canbody 2 pass under' while' valve v20 remains still, thereby making another connection 26. v

The abovedescribed valve movement which providesconnection between chambetween chambers 24 and bers 24 and 26, efectsv'the actuation of the brake and clutch 1nechanism whereby the machine is stopped. f

Referring now to Figures 1 and 2, 31 designates the drive shaft of the machine. Thishas a pulley 32 revolubly mounted on it, which i-s driven by a belt 33, and which is operatively connected4 to drive the shaft through certain clutch mechanism presently described. 0n the shaft 31 is a worm 35 which drives a. gear 36` on a vvertical shaft the latter being lconnected by a train of gears 38 with shaft 9 which revolves the can-` 19 and 20 are actuated so as to provide a connection between Vchambers 24 and 26, the piston will be actuated, by vacuum pressure,

from position as shown in Figure 8, in,

wardly to position as shown in Figure 9.

'lhe pulley 32 is provided on its inner face with a friction clutch surface 45 against which a friction disk 46 may be pressed to' edect a driving connection with the shaft 31. x

rlhe disk L46 has a hub portion that is slida` bly'mounted upon acollar 47 that is fixed to the shaft 31 by means ofa `pin 48. A pairof levers 49 arelpivo'tally supported by pins ,50 from the vdisk body andthese have their inner ends 51 extended into slots 52 in the collar 47 to provide a driving connection between the disk and the sha-ft. l

4A cone 54 is slidabl mounted on the shaft 31 and may be shifte by movement of lever 40 to actuate the clutch. The cone'is ac tuated by means of a pin 55 fixed inthe lever and projecting into' a groove 56 in the cone. The levers 49 have arms 57 provided with rollers l58 engaging the cone surface and when the-latter is shifted outwardly it actuates thesearms to move the levers in such lmanner as to` press; the clutch disk against the pulley to e'ect the driving of the shaft 31 and when the cone is moved inwardly, springs 59' between the outer ends of the levers and the disk permit the latter to release the disk from driving connection with the pulley. Fixed concentrically to the disk 46 1s a brake drum 53 and fitted to 'this are upper and lower brake bands 61 and 62, respectively, having enls connected by a .hinge pin 63 and provide other ends with shoes 64 and 65. Su lported on a pivot pin 66 that extends from allnracket 67 fixed to the machine frame, is a bell crank lever 68 having a horizontal arm 69 and a vertical arm 75,.; the formerv bein connected .at its end by means of pivotal y attached at their .connection with the lever. The vertical arm 75 of the bell crank 68 is provided on its inner face with a lug 76 that. is engageable with stop screws 77 and 78 that are adjustably mounted in the bracket 67, to limit -the crank movement` in opposite directions. This arm is connected by a link 80 with a crank armV 81 extending from' lever 40, so that the brake may be set or released manually by movement of the lever the latter being pivotally mounted on a pivot pin 40 xed in the upper end of vbracket 67.

The lever 71 has a horizontal arm 83 with one end extended between tle brake band shoes 64 and 65 and its other end forming a stop shoulder 8 5 that is extended to a position that it will be engaged by the upper face of a lug 86 on the bell crank 68. An eye bolt 88 is fixedto the upper brake shoe 64 and extends downwardly and slidably' through a pivotpin 89 carried by the inner' end of the arm 83 of the lever 71 and downwardly through aslot 90 in the brakeshoes 65. A lspring 91 is coiled about the lower end of bolt 88 vto press upwardly against the pin 89 and'against tensionadjusting nuts 92 on the lower end of the'bolt. A lstop nut 93 ad-y justablj7 mounted on thebolt 88 limits the downward movement'of the bolt through the pin89.v t l Assuming that the parts are .so constructed andV assembled, and in normal position, as shown in. Figure 8, should the feed mecha'-v nism, previously described, failto function so thatthe valveparts 19 and 20 are moved kto effecta vacuum pressure connection ,bef` tween pipe22 and the cylinder 42, the piston 41 .will be actuated.. and by its movement,- through connecting link 7 3, the lever- 71 will be moved pivotally to a new position, as shown in Figure 9, and the arm 83there'o will pull down on the upper 'brake band` through the medium of eye bolt 88'/ and spring 91, and will bring. both brake bands into engagement with the brakedru'rn.` The drum will tend to rotate the brake bands `with it and will therebyv cause thejlinks 7 0, attached to` both brake band,l 62gandf'bell crank 68, to rotate the crank68 to. the posi j tion as it is shown in Figure 10, and in doing so will move the lug '7 6 of thev lever against d the stop screw 7 8 which'limits itsl travel and formsv a. fixe-d anchor for the brake. l "I-he stop shoulder on'the arm83 is thereby brought against.I lug 86, (Figure v10) and. since the end oflever arm`83 is, now in closer relative position to the end of the lower brake band 65 than when in normal position.,

(Figure 8) brake tension is held on the drum by tension of the spring 91. This tension maybe regulated by adjustments of nuts 92 to any degree required for quickly or gradually stopping the machine. Also, as the crank 68 is moved, it actuates Ilever 40, by

vmeans of connecting member 80, to release `v`the clutch.

An adjusting arrangement to keep the brake band from-dragging on the drum is provided vin `a supporting set screw in 'an arm 101 extended from bracket 67 anti another set' `screw 102 in lever arm- 71. A spring 97 coiled about an eye bolt 95 that -is fixed to the shoe 65 and which extends through a slot 96v in the arm 71, acts against the arm 71 to' return the bracket to. normal position immediately as the rotating motion of the brake stops,` and set screw 102 will adjust the bands with respect to the drum.v lThis operation automatically Stbps the machine and as soon as the rotating motion of.

drum ceases, there being no vacuum holding piston 41 over as shown in Figure 9, spring 97 will draw levers71` and shoe 65 back together releasing brake, and automatically resetting all parts to normal position, shown in Figure 8, but does not Athrow the clutch vto normal position and the` brake band released from 'the drum without causing re- Vsetting movement of the clutchm Tostart machine 'after trouble has been remedied lever 40'ispulledover slid-ing cone 54vbe.

. tween rollers of levers 58 substantially as ,'describetd, beginning at line 105, page 2.-

1 lustrated .an alternative mechanism where- ,byv the `saine result, as just described can befaccomplished by the use kof an electric sole- 74through the solenoid.

` Inthls construction wwhich are connected electrically with wires 112 and 113 for-closing a circuit through noid in place of the\ cylinder and piston, andbynsing electric contacts in 'place of l 'fthe valves 19 and 20 for closing a circuit-2110l the link 73 would be connected. to the -armature 105 ofthe sole-' "no id 106,;and the latter connected with'a'115 and,108.f` lVithin the b/ase of the housing 25. l is laced a block of `insulation `109 upon* which two plates 110, 1114are fixed and the solenoidjfrom a source ofv electricity.

Supported"fromthe endsf of plate 110fiare1 f circularly formed segmented bands 114land *115, yand opposite thereto are segments 51165125 :i

kand 117` secured tothef ends of plate @111.

l Supportedby vposts118 and 119 that; aref mounted to extend u wardly between plates 110411115areseini-circular contacts `120 and i l i 121, the ends ofthe former being adapted to into' contactgwith ,bands 114 and..

b'e pressed "10, closing the circuit, and thisconsists ot collars 125 and 126 liXed respectively to the upper ends of the shafts and which support Contact blocks 127 and '128 of a non-conductive character which are for the purpose of l pressing the ends of contact segments' 120 and 121 intov circuit `closing contact with segments 114, 115, 116, and 117. Y

When the machine is operating normally the blocks are positioned as shown in Fig- A 2G ure 13, and When the levers 10 and 11 are engaged by the can ends and bodies, the shafts rotate together andmove the blocks to position as shown in Figure 14, still leaving the circuit to the solenoid open. should the canl end feed fail and a body pass into themachine without an end therefor, shaft 13 Will be actuated While shaft 12 remains still and this would cause the block 128 to be removed to position, as shown 30. in Figure 15, to press end of lContact band,

120 against Contact 116 to thereby close the circuit through thesolenoid to stop the machine. Likewise, should a can end pass into the machine Without a body therefor, the shaft 12 Will be rotated While shaft 13 remains still, and this will cause block 127 to engage contact segment 121 to pressl it into circuit closing contact With plate 115, as :shown in lFigure 16, to close the circuit 10 ithrough the'solenoid to stopth'e machine.

llt is readily apparent that with the mechanism illustrated the stopping operation is entirely automatic and parts Will be automatically reset after the machine has been stopped by means of spring 97; The mechanism in no Way prevents manual operation by use of lever 10. Having thus described my invention, what l claim as new therein and desire to secure 50., by Letters-Patent is: i

1. lln'a machine of the class described, the combination With means for advancing can bodie'sand-ends into the machine and brake mechanism operable to stop the same, of yieldable memberspositioned to be engaged and moved respectively by can bodiesand ends as advanced and mechanism under control of said members operable to actuate the brake mechanism. 00. 2. lin a machine of the class described, Vthe combination with means Jfor advancingl can bodies and can ends into the machine` and brake mechanism operable to stop the same, of yieldable members positioned to be simultaneously engaged respectively by ca-n But.

3. Inl a machine of the class described,`

the combination -With means for advancing can bodies and ends into the machine anda brake mechanism operable to stop the same,

of an air cylinder, a piston in the cylinder operatively connected to actuate the brake mechanism, a source of pressure, a conduit connecting said source and cylinder, a normally closed valve mechanism in saidcon duit and yieldable members positioned to be simultaneously engaged by can ends and bodies delivered into the machine, operably connected With the valve mechanism Whereby the valve Will be opened ir" either of said members is moved individually.

4. ln a machine of the class described,the combination with means for advancing can bodies and ends therefor into the machine, a brake and clutch mechanism operable to stop the same, and a vacuum pressure source, ot a cylinder, a piston in the cylinder operatively connected toJ actuate the brake and clutch from driving to off position, a conduit connecting the cylinder with the vac-Y uum source, a valve mechanism connected in the conduit and normally closing the same, a pair of yieldably supported levers positioned to be engaged and moved simultaneously by can ends and bodies delivered into the machine and operatively connected With the valve mechanism to cause the latter to be opened, should either lever be moved individually, to thereby etect actuation of the piston, and automatic means for resetting the brake and valve parts.

5. 1n a machine of the class described, the

il, combination with means for advancing can `bodies and ends therefor into the machine a shaft for actuating cachot said movable,

members, levers fixed to said shafts and eX- tendedto be simultaneously engaged and moved by can bodies and ends as advanced into the machine.

lee

icc

los

vne

6. 1n a machine of the class described,uthe

combination with means for advancing can bodies and ends therefor into the machine, and mechanism operable to stop the same, of a cylinder, a piston movable in thecylinder and operatively connected to actuate the stop mechanism, a source of pressure and conduits connecting the said source and cylinder, a valve mechanism connected in tne conduits to normally close the same comprlsing central and outerv chambers, a pair ofv` relat1vely movable valve members between the said chambers having normally non-registering ports, an actuating shaft for L each of said valve members, lever arms fixed to said shafts and extended within therpaths of can ends and bodies advanced into the machine whereby movement ofon member lWithout like movement of the other Will move the ports of the valve members into registration to open the valve and eifect ac-` tuation of the piston.` Y. l

v7. In a machine'o'f/the class described, the combination with a source of pressure medium, meansfor advancing can bodies and ends therefor into the machine Yand brake mechanism' operable by sai/d pressure me= dium to stop'the machine, of a control mechanism for the pressure medium comprising a valve houslnghavlng a ported central chambern connected With the pressure medium source andan outer chamber connected with the brake actuating mechanism, a pairv of valves fitted one upon th`e other 'about the said central chamberl normally closing its ports, andhaving normally non-registering ports therein, `a shaft .for rotatlng each of said valves, lever arms fixed to said' shafts and extended in position to be actuated by can ends and bodies advanced into the mahineand whereby if either is act-uated individually, ports are brought into registration to effecta connection betweenl the valve chambers. i p 8. In a machine of the class described, the combination with means for advancing can' ends and bodies into the machine, a stop Mechanism therefor, land a source of pressure medium havin val connection with the 'stop mechanism, o a control .device com! risingv a supporting bracket and an integral ousing formin an outer valvefchamber, a cover for the ousing formin a central valve chamber connected with t e' source of pressure medium and having outlet yports a tubular shaft rotatably supported in the bracket and extended into the housing,.`an other shaftrotatable `within the tubular shaft, valves fixed to said shafts and/ fitted lone to the other and to thel central valve-Y,

to be lactuated thereby to reyolubly move the valves, said .valves being-provided with no'rf5k mally .non-registerable pprts'ada tedtolbe moved into. reglstratlon yindivi ual actipn of either leverv to thereby `o en the 'valvebut `to retaintheir relative c osed relationif actuated together, andV yieldable means fixedA to thel shaft and bracket for returning the `parts to normal positlon.

a. In e machine f the dass described, the? mecha `isposed tobe engagedl byf'the bo and bodies and ends into the machine.L

10. In a machine of lthe character de scribed, the combination with means adapt ed for the synchronous feeding of c an bodies and endstherefor into the' machine, a

source of pressure medium, a-stopping mechanism connected with and'adapted to be, in-f iuenced by the admittance thereinto of said pressure medium l,to set* the brake and to release the clutch, 'and-a pressure medium control valve comprising parts disposed to be engagedby the bodies and ends fed into the machine and to be so actuated incidental to any disturbance inv the synchronous feeding of the bodies and ends as to. thereby admit pressure. medium to the s opping f 1,1. Inka machinev of the i character described, the ycombination'with means adapted for. the synchronous feeding/of can bod-f ies and ends'therefor intc the machine, a

driving clutch and a. brake mechanism, of

a vsource of pressure medium, a stopping mechanism connected with and adapted kto be influenced by the admittance thereinto 4 of said pressure'medim toset the brake` nd to -release the. clutch, and a pressure gnedium lcontrol, valvev comprisin parts ends fed into the machine and to be so actuated incidental to anyv disturbance. in the synchronous feeding of the bodies and ends as to thereby admit, stopping mechanism, `nd manually oper-l able means for resettingthe clutch. 'y

the combination ,'with means :Gon advancing can bodies and ends therefor into the machine, aclutch` mechanism, a brake drum, and a brake setting device operable' upon the-discontinuance of feed of can lbodies or 'ends,` cfa brake for' the drumJ operatively connected .with the setting 'driving clutch and a brake mechanism, of`a .pressure medium tothe' '12` Inal'machine .of the class described,r

device and adapted to'b'efmoved rotatably tact, a pivotally suppertdxbell crank 'lever having oneVarmoperatively connected -fwith the brake wherebynsu'ch rotatable lmvementiof the latter will move" the crank pivwvithlthe drum when actuated to braking coni otally, and having'its other 'arm connectedv to release the clutch by' s u'ch pivotal move- 13. In a. machine of the class described, the combination with means for feedingr can bodies and ends into the machine, a 'driving clutch for the saidmeans movable bet-Ween on and oit positions, a brake drum, and a brake setting device operable by a discontinuance of the delivery of can ends or bod-- ies into the machine, of a brake band for. the drum adapted to be clalnped thereagainst by thev lsetting device and to move rotatably with the drum when set, a pair of spaced stop members,l a pivotally supported bell crank lever having one arm operatively connected to actuate the clutch to oft position and having its other arm operatively connected with the brake band and setting device, said crank being pivotally movable by rotative 'movement of the brake band and having a stop lug thereon engageable with said stops to limit its movement.

14. ln a machine of the class described, the combination with means for advancing can bodies and ends into the machine, a clutch mechanism, a brake drum, and a brake setting device operable under the control of can ends antibodies delivered into the machine, of a brake band for the drum adpated to be rotated a limited distance' .with the drum when brought inte braking contact therewith, a pivotally mounted bell crank lever, another bell crank lever having an arm pivetally supported from one arm of the first bell crank and operatively connected for actu-- ating the brake band, and its other arm connected with the brake setting device, and

means operatively connecting the lirst bell crank With the clutch mechanism whereby movement ofy the crank incidental to the brake band movement releases the clutch.

y,15. lln a machine of the class described, the combination with a drive shaft, a clutch on the shaft., a bra-ke drum and a brake settingr device under the'control of can parts delivered into the machine, of a brake band for the drum, a pair of spaced apart stops, a pivotally mounted bell crank lever having a vertical and horizontal arm, and provided with a stop lug engageable with said spaced stops to limit its pivotal movement, means connecting the vertical `arm actuating the clutch, a link connecting-the end of horizontal arm of said lever with the free endet the lower brake band, a second bell crank having a vertical arm connected with the brake settingdevice, and a horizontal arm pivotally connected between its ends With the horizontal arm of the firstV lever Aand at its end lia/ving a yieldable connection With the free end or" the brake band.

Signed at Seattle, Washington, this 19th day `oit January, 1923,

MERTON L. DODGE 

